Mark and Derek's Excellent Flip

Web Exclusive: Mark and Derek's Bonus Videos

Go behind the scenes on Mark and Derek's Excellent Flip
and see these not-ready-for-primetime clips -- including an impromptu visit from Mark's mom, Derek trying to master a British accent, how many dancers it takes to screw in a drywall screw, and how not to turn off a home security system. You won't see these on television.